our economy is actually run on gps now. we're aware of this. we're, certainly, in our work, working to make sure there's adequate redundancies in any systems that we would test so that its positions not only relies on the gps signal, and in other situation awareness issues associated with that as well. our focus is on security of the command and control signal of the vehicle making sure within the frequencies we operate in that those are secure and the data that we're transmitting is reliable and is valid data. we have a robust research effort as far as that. spoofing the signal, we're aware of it. we're cognizant of what they did, and it's part of the knowledge base in the constraints we operate under, but we don't have any particular research efforts going towards spoofing of the gps signal. >> certainly, this is of great concern to americans, not only because of the safety, just generally, but also because of if the professor and students can spoof the gps system, what could other nation states or terrorist groups do also? with federal and c